/**
 * Copyright (C) 2013 DaiKit.com - daikit4gxt module (admin@daikit.com)
 *
 *         Project home : http://code.daikit.com/daikit4gxt
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.daikit.daikit4gxt.client.model.labelprovider;

import java.util.Map;

import com.daikit.commons.shared.utils.DkStringUtils;
import com.sencha.gxt.data.shared.LabelProvider;


/**
 * Generic {@link LabelProvider} for enums
 * 
 * @author tcaselli
 * @version $Revision$ Last modifier: $Author$ Last commit: $Date$
 * @param <T>
 *           The eum Type
 */
public class EnumLabelProvider<T extends Enum<T>> implements LabelProvider<T>
{

	private final Map<T, String> enumToLabelMap;

	/**
	 * Constructor
	 */
	public EnumLabelProvider()
	{
		this.enumToLabelMap = null;
	}

	/**
	 * Constructor
	 * 
	 * @param enumToLabelMap
	 *           a {@link Map} with key=enum values, and values=String labels
	 */
	public EnumLabelProvider(final Map<T, String> enumToLabelMap)
	{
		this.enumToLabelMap = enumToLabelMap;
	}

	@Override
	public String getLabel(@SuppressWarnings("rawtypes") final Enum item)
	{
		final String s = enumToLabelMap == null ? DkStringUtils.toString(item) : enumToLabelMap.get(item);
		return (s == null) ? item.name() : s;
	}

}
